1 /* ----------------------------------------------------------------------------- 2 Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4 Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Frderung der angewandten 5 Forschung e.V. All rights reserved. 6 7 1. INTRODUCTION 8 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software 9 that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding 10 scheme for digital audio. This FDK AAC Codec software is intended to be used on 11 a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient 14 general perceptual audio codecs. AAC-ELD is considered the best-performing 15 full-bandwidth communications codec by independent studies and is widely 16 deployed. AAC has been standardized by ISO and IEC as part of the MPEG 17 specifications. 18 19 Patent licenses for necessary patent claims for the FDK AAC Codec (including 20 those of Fraunhofer) may be obtained through Via Licensing 21 (www.vialicensing.com) or through the respective patent owners individually for 22 the purpose of encoding or decoding bit streams in products that are compliant 23 with the ISO/IEC MPEG audio standards. Please note that most manufacturers of 24 Android devices already license these patent claims through Via Licensing or 25 directly from the patent owners, and therefore FDK AAC Codec software may 26 already be covered under those patent licenses when it is used for those 27 licensed purposes only. 28 29 Commercially-licensed AAC software libraries, including floating-point versions 30 with enhanced sound quality, are also available from Fraunhofer. Users are 31 encouraged to check the Fraunhofer website for additional applications 32 information and documentation. 33 34 2. COPYRIGHT LICENSE 35 36 Redistribution and use in source and binary forms, with or without modification, 37 are permitted without payment of copyright license fees provided that you 38 satisfy the following conditions: 39 40 You must retain the complete text of this software license in redistributions of 41 the FDK AAC Codec or your modifications thereto in source code form. 42 43 You must retain the complete text of this software license in the documentation 44 and/or other materials provided with redistributions of the FDK AAC Codec or 45 your modifications thereto in binary form. You must make available free of 46 charge copies of the complete source code of the FDK AAC Codec and your 47 modifications thereto to recipients of copies in binary form. 48 49 The name of Fraunhofer may not be used to endorse or promote products derived 50 from this library without prior written permission. 51 52 You may not charge copyright license fees for anyone to use, copy or distribute 53 the FDK AAC Codec software or your modifications thereto. 54 55 Your modified versions of the FDK AAC Codec must carry prominent notices stating 56 that you changed the software and the date of any change. For modified versions 57 of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" 58 must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK 59 AAC Codec Library for Android." 60 61 3. NO PATENT LICENSE 62 63 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without 64 limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. 65 Fraunhofer provides no warranty of patent non-infringement with respect to this 66 software. 67 68 You may use this FDK AAC Codec software or modifications thereto only for 69 purposes that are authorized by appropriate patent licenses. 70 71 4. DISCLAIMER 72 73 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright 74 holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, 75 including but not limited to the implied warranties of merchantability and 76 fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 77 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, 78 or consequential damages, including but not limited to procurement of substitute 79 goods or services; loss of use, data, or profits, or business interruption, 80 however caused and on any theory of liability, whether in contract, strict 81 liability, or tort (including negligence), arising in any way out of the use of 82 this software, even if advised of the possibility of such damage. 83 84 5. CONTACT INFORMATION 85 86 Fraunhofer Institute for Integrated Circuits IIS 87 Attention: Audio and Multimedia Departments - FDK AAC LL 88 Am Wolfsmantel 33 89 91058 Erlangen, Germany 90 91 www.iis.fraunhofer.de/amm 92 amm-info (at) iis.fraunhofer.de 93 ----------------------------------------------------------------------------- */ 94 95 /**************************** AAC decoder library ****************************** 96 97 Author(s): Robert Weidner (DSP Solutions) 98 99 Description: HCR Decoder: Defines of state-constants, masks and 100 state-prototypes 101 102 *******************************************************************************/ 103 104 #ifndef AACDEC_HCRS_H 105 #define AACDEC_HCRS_H 106 107 #include "FDK_bitstream.h" 108 #include "aacdec_hcr_types.h" 109 /* The four different kinds of types of states are: */ 110 /* different states are defined as constants */ /* start middle=self next 111 stop */ 112 #define STOP_THIS_STATE \ 113 0 /* */ 114 #define BODY_ONLY \ 115 1 /* X X X */ 116 #define BODY_SIGN__BODY \ 117 2 /* X X X X [stop if no sign] */ 118 #define BODY_SIGN__SIGN \ 119 3 /* X X [stop if sign bits decoded] */ 120 #define BODY_SIGN_ESC__BODY \ 121 4 /* X X X X [stop if no sign] */ 122 #define BODY_SIGN_ESC__SIGN \ 123 5 /* X X X [stop if no escape sequence] */ 124 #define BODY_SIGN_ESC__ESC_PREFIX \ 125 6 /* X X */ 126 #define BODY_SIGN_ESC__ESC_WORD \ 127 7 /* X X X [stop if abs(second qsc) != 16] */ 128 129 /* examples: */ 130 131 /* BODY_ONLY means only the codeword body will be decoded; no 132 * sign bits will follow and no escapesequence will follow */ 133 134 /* BODY_SIGN__BODY means that the codeword consists of two parts; 135 * body and sign part. The part '__BODY' after the two underscores shows */ 136 /* that the bits which are currently decoded belong 137 * to the '__BODY' of the codeword and not to the sign part. */ 138 139 /* BODY_SIGN_ESC__ESC_PB means that the codeword consists of three parts; 140 * body, sign and (here: two) escape sequences; */ 141 /* P = Prefix = ones */ 142 /* W = Escape Word */ 143 /* A = first possible (of two) Escape sequeces */ 144 /* B = second possible (of two) Escape sequeces */ 145 /* The part after the two underscores shows that 146 * the current bits which are decoded belong to the '__ESC_PB' - part of the */ 147 /* codeword. That means the body and the sign bits 148 * are decoded completely and the bits which are decoded now belong to */ 149 /* the escape sequence [P = prefix; B=second 150 * possible escape sequence] */ 151 152 #define MSB_31_MASK 0x80000000 /* masks MSB (= Bit 31) in a 32 bit word */ 153 #define DIMENSION_OF_ESCAPE_CODEBOOK 2 /* for cb >= 11 is dimension 2 */ 154 #define ESCAPE_CODEBOOK 11 155 156 #define MASK_ESCAPE_PREFIX_UP 0x000F0000 157 #define LSB_ESCAPE_PREFIX_UP 16 158 159 #define MASK_ESCAPE_PREFIX_DOWN 0x0000F000 160 #define LSB_ESCAPE_PREFIX_DOWN 12 161 162 #define MASK_ESCAPE_WORD 0x00000FFF 163 #define MASK_FLAG_A 0x00200000 164 #define MASK_FLAG_B 0x00100000 165 166 extern void DecodeNonPCWs(HANDLE_FDK_BITSTREAM bs, H_HCR_INFO hHcr); 167 168 UINT Hcr_State_BODY_ONLY(HANDLE_FDK_BITSTREAM, void*); 169 UINT Hcr_State_BODY_SIGN__BODY(HANDLE_FDK_BITSTREAM, void*); 170 UINT Hcr_State_BODY_SIGN__SIGN(HANDLE_FDK_BITSTREAM, void*); 171 UINT Hcr_State_BODY_SIGN_ESC__BODY(HANDLE_FDK_BITSTREAM, void*); 172 UINT Hcr_State_BODY_SIGN_ESC__SIGN(HANDLE_FDK_BITSTREAM, void*); 173 UINT Hcr_State_BODY_SIGN_ESC__ESC_PREFIX(HANDLE_FDK_BITSTREAM, void*); 174 UINT Hcr_State_BODY_SIGN_ESC__ESC_WORD(HANDLE_FDK_BITSTREAM, void*); 175 176 #endif /* AACDEC_HCRS_H */ 177
